cross a bridge when you come to it

cross that bridge when (one) comes to it

To address something only when it actually happens or becomes an issue. A: "Do you know if that road is still closed?" B: "No, so I guess we'll have to cross that bridge when we come to it." The job interview is a week away, so I'm not worried about it yet—I'll cross that bridge when I come to it.
See also: bridge, come, cross, that

cross a ˌbridge when you ˈcome to it

,

cross your ˌbridges when you ˈcome to them

deal with a problem only when it happens and not worry about it before then: ‘What will you do if you can’t afford to run your car next year?’ ‘I’ll cross that bridge when I come to it.’
See also: bridge, come, cross